When importing Order Guides and you have existing products, you have the option to either ONLY update the bid price, OR you can overwrite the pack size for any existing products. If you check the box in Setup/Options will automatically overwrite There are this many, Pack Size, Unit Description and All of it Packed in .
To overwrite the pack size on Order Guide import:
1. Click on the Gear/Setup/Options
2. Click on Order Guides and check the box next to Overwrite pack size information:
3. Don't forget to click the green SAVE box.